# iter_swap(std::move_iterator)

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< cpp‎ | iterator‎ | move iterator

template< std::indirectly_swappable<Iter> Iter2 > friend constexpr void iter_swap( const move_iterator& x, const std::move_iterator<Iter2>& y ) noexcept(/* see below */); |  | (since C++20)

Swaps the objects pointed to by two underlying iterators.

Equivalent to ranges::iter_swap(x.base(), y.base());.

This function template is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::move_iterator<Iter> is an associated class of the arguments.

### Parameters

x, y | - | move iterators to the elements to swap

### Complexity

Constant.

### Exceptions

`noexcept` specification:
noexcept(noexcept(ranges::iter_swap(x.base(), y.base())))

### Example

Run this code

    #include <iostream>
    #include <iterator>
    #include <string>
    #include <vector>

    int main()
    {
        std::vector<std::string> p{"AA", "EE"},
                                 q{"ⱯⱯ", "ƎƎ"};

        std::move_iterator<std::vector<std::string>::iterator>
            x = std::make_move_iterator(p.begin()),
            y = std::make_move_iterator(q.begin());

        std::cout << *x << ' ' << *y << '\n';

        iter_swap(x, y); // ADL

        std::cout << *x << ' ' << *y << '\n';
    }

Output:

    AA ⱯⱯ
    ⱯⱯ AA

### See also

swap | swaps the values of two objects (function template)
swap_ranges | swaps two ranges of elements (function template)
iter_swap | swaps the elements pointed to by two iterators (function template)
iter_swap (C++20) | swaps the values referenced by two dereferenceable objects (customization point object)
iter_swap (C++20) | swaps the objects pointed to by two adjusted underlying iterators (function template)

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